This contribution presents an overview of the results of research into archaeological, constructional and historical aspects of the ruin of Rokštejn Castle (cadastral unit of Panská Lhota, Brtnice, Moravia). Rescue research started here in 1981 in reaction to the planned construction of the Střížov reservoir, and since 1996 has continued as study research carried out by the Institute of Archaeology and Museology of the Faculty of Arts, Masaryk University, Brno. An area of approximately 2 000 m2 has been explored, with ca. 750 m2 remaining. The article outlines the history of the castle, first mentioned in written sources in 1289, and its constructional and historical development, divided into four phases: IA (last quarter of the 13th century – early 14th century) and IB (ca. 1310–1350/60); phase II when the castle was owned by the Moravian Luxembourgs in the second half of the 14th century; and phase III associated with the Valdštejns, until the period when the castle sustained damage, possibly during the Hussite wars, and its emergency reconstruction and partial use until the 1460's (phase IV). The last section of the article is devoted to the make-up of finds, including ecofacts and the state of their processing, as well as problems that have to be addressed in relation to comprehensive research into the castle, its heritage restoration and further use.